// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "gpu/command_buffer/service/id_manager.h"
#include "base/logging.h"

namespace gpu {
namespace gles2 {

    IdManager::IdManager() { }

    IdManager::~IdManager() { }

    bool IdManager::AddMapping(GLuint client_id, GLuint service_id)
    {
        std::pair<MapType::iterator, bool> result = id_map_.insert(
            std::make_pair(client_id, service_id));
        return result.second;
    }

    bool IdManager::RemoveMapping(GLuint client_id, GLuint service_id)
    {
        MapType::iterator iter = id_map_.find(client_id);
        if (iter != id_map_.end() && iter->second == service_id) {
            id_map_.erase(iter);
            return true;
        }
        return false;
    }

    bool IdManager::GetServiceId(GLuint client_id, GLuint* service_id)
    {
        DCHECK(service_id);
        MapType::iterator iter = id_map_.find(client_id);
        if (iter != id_map_.end()) {
            *service_id = iter->second;
            return true;
        }
        return false;
    }

    bool IdManager::GetClientId(GLuint service_id, GLuint* client_id)
    {
        DCHECK(client_id);
        MapType::iterator end(id_map_.end());
        for (MapType::iterator iter(id_map_.begin());
             iter != end;
             ++iter) {
            if (iter->second == service_id) {
                *client_id = iter->first;
                return true;
            }
        }
        return false;
    }

} // namespace gles2
} // namespace gpu
